Inspec keywords: edge detection; gamma distribution; expectation-maximisation algorithm; gradient methods; image enhancement

Other keywords: Canny edge-detector; EM algorithm; Gamma mixture model; Gamma distribution model; image gradient histogram; gradient magnitude distribution

Subjects: Interpolation and function approximation (numerical analysis); Image recognition; Other topics in statistics; Other topics in statistics; Interpolation and function approximation (numerical analysis); Computer vision and image processing techniques